Thanks folks. Yeah, after seeing the occasional post for a missing, stolen, or unidentifiable cue, it just seemed odd that so many cues, especially very expensive ones, do not have an identifying number somewhere on them.
The custom cue thing I totally understand is a customer driven market.
I feel a little helpless as far keeping an eye out for a stolen cue unless there is a feature that the police could identify at a glance. I'll carry a a few dozen numbers in my wallet around with me, but I'm not going to load up a bunch of pictures in my wallet. And furthermore, if I had a number of a stolen cue, and I saw a cue with the same number, I would definitely call the police. If I only had a picture and description that matched, I don't think that's enough to get the job done.